1254343140 has 144 divisors (see below), whose sum is σ = 4020307200. Its totient is φ = 315684864.

The previous prime is 1254343099. The next prime is 1254343163. The reversal of 1254343140 is 413434521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1206741 + ... + 1207779.

It is an arithmetic number, because the mean of its divisors is an integer number (27918800).

Almost surely, 2^1254343140 is an apocalyptic number.

1254343140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1254343140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2010153600).

1254343140 is an abundant number, since it is smaller than the sum of its proper divisors (2765964060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1254343140 is a wasteful number, since it uses less digits than its factorization.

1254343140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1254343140 is about 35416.7070744868. The cubic root of 1254343140 is about 1078.4635043938.

Adding to 1254343140 its reverse (413434521), we get a palindrome (1667777661).

The spelling of 1254343140 in words is "one billion, two hundred fifty-four million, three hundred forty-three thousand, one hundred forty".